CAJ | 학술논문

以固相烧结莫来石为增强体,制备了莫来石增强磷酸铬铝基复合材料。研究了烧结温度对复合材料的微观结构和性能的影响。采用 SEM、XRD、EDS等检测手段对复合材料的物相结构及断面的微观形貌进行分析,使用万能试验机测试其材料的抗折强度,并使用矢量网络分析仪分析材料的介电性能。结果表明,随着烧结温度的升高,复合材料中莫来石的晶粒依次增大,材料致密度、介电常数增加,抗弯强度增加,但过高的烧结温度下抗弯强度会降低。当烧结温度为1500℃时,材料的抗弯强度为107 MPa,平均介电常数为3.57。
이고상소결막래석위증강체,제비료막래석증강린산락려기복합재료。연구료소결온도대복합재료적미관결구화성능적영향。채용 SEM、XRD、EDS등검측수단대복합재료적물상결구급단면적미관형모진행분석,사용만능시험궤측시기재료적항절강도,병사용시량망락분석의분석재료적개전성능。결과표명,수착소결온도적승고,복합재료중막래석적정립의차증대,재료치밀도、개전상수증가,항만강도증가,단과고적소결온도하항만강도회강저。당소결온도위1500℃시,재료적항만강도위107 MPa,평균개전상수위3.57。
Using mullite as reinforcement,the mullite reinforced aluminum-chromium-phosphate(ACP)matrix composite were prepared by solid-phase sintering.the effect of sintering temperature on the microstructure and properties of mullite reinforced ACP matrix composite were researched in detail.The structures and fracture surface morphologies of the composites were characterized by XRD,SEM and EDS analyses.The flexural prop-erty of the composites were tested by a universal testing machine,the dielectric constant were tested by vector network analyzer.The results show that with the sintering temperature increased,the size of mullite grain in the composites increased,meanwhile,the density and dielectric constant of the materials were elevated.the flex-ural strength increased at the incipient stage.Then,it reduced at higher temperature.when the sintering temper-ature was 1 500 ℃,the mechanical properties of the obtained composites are the best,of which the flexural strength was 107 MPa and the average dielectric constant was 3.57.